Yes I run currently with the PG13 Container. I have rebuild it multiple times. I even cleaned up the dangling _new Directory. Just every time I try to go to 15 or the official unversioned Template it fails. I will migrate it manually soon if this does not fix itself. I dont see how the OS is relevant here.
BTW the script sequence differs in postgres.15.template and postgres.template, which one is better for the Update?